There is the story of Degas standing weeping with sadness in front of The death of sardenopolis at the way its colors had faded over time.
[1] https://api-www.louvre.fr/sites/default/files/styles/w1059_h...
(and https://fr.wikipedia.org/wiki/Prise_de_Constantinople_par_le... )
give a bit more context.
Stood out to me:
> 498 cm × 410 cm (196 in × 160 in)
- let's go and reclaim Jerusalem from those non-Christian infidels!
- Sure. We're gonna need a bigger boat. Let's ask the Venetians.
- Here are your ships, guys.
- Err, we have no money.
- Sigh. ok. Go and attack our rivals over there.
- The byzantines in Constantinople? They're Christian.
- You want something to do, or not?
- Fine. let's kill them all, boys.
Result: Constantinople is ravaged. Byzantine Empire fatally weakened. Ottomans take the city 200 years later.